Whether the pilot gets upset or not, ATC has to get that readback and hear the runway and numbers in that hold short instruction. There have been too many times where not hearing it or making sure that they understand what they need to do leads to a runway incursion.

It's interesting how the brain works, isn't it? The controller is being very clear. The pilot thinks he (the pilot) is also being very clear with his response, not being aware that it's the runway number that's missing.

I'm also glad to see it didn't devolve into a mess. Stiff upper lip from Speedbird there